krb5_kdc_sign_ticket
ret = krb5_kdc_sign_ticket(context, enc_tkt_reply, new_pac, server->princ,
ret = krb5_kdc_sign_ticket(context, ticket->enc_part2, pac, sprinc,
ret = krb5_kdc_sign_ticket(context, ticket->enc_part2, pac2, sprinc, NULL,